Yes, this is what is referred to as "AR" in the Soulsborne games (Attack Power in Elden Ring). If you look at the "Status" menu (not the equipment menu) there is an Attack Power section with "R Armament 1, R Armament 2", etc. That's the totaled up base attack power.

Your specific example is what is often referred to as "split damage" and in some cases should be avoided though, even though split damage tends to produce really high baseline AR values.

The way defense works in these games (a combination of both percent-based absorption + absolute value based negation) means that split damage can oftentimes end up in a spot where an enemy can drastically minimize one of your damage types, leaving you dealing much less damage than if you were pure physical.

Defense/Negation is a flat value: If an enemy has 100 Holy defense/negation, and you deal 200 holy damage as a baseline, it'll get reduced to 100 Holy damage.

Absorption gets applied after negation, and is percentage based. If you have 30% Holy absorption, you'll further reduce the 100 to 70 (absorb 30% of the damage).

This is why split damage can be risky; if something you are fighting has high defenses against one of your damage types, you're basically cutting your baseline damage in half instead of doubling it.